Whorl latch



I Oct. 27, 1931. v R. J. BARTHOLOMEW 1,828,993

WHORL LATCH Filed Feb. 5, 1931 Patented Oct. 27, 1931 UNITEDV s'ra'rasv PATENT-l OFFICE ROBERT J'. BARTHOLOIMEW,` 0F GERMANTOWN, PENNSYLVANIA,` ASSIGNOR f. TO

FLETCHER WOR-KS, INCORPORATED,y OF 4PI-IILADELPHIA, PENNSYLVANIA, A COR- PORATION OF PENNSYLVANIA wHoRL `LATCH' Application filed February 5, 1931. Serial No. 513,627.

VThis invention relates to an improvement in Whorl latchesy for locking the whorl spindles for silk throwing machines for example, the construction being such that the whorl and the spindle blade maybe easily removed and replaced without loss of time, my construction being sufficiently rigid also to withstand the heavy pull and jerk to which the whorl and spindle blade are subjected by the operator when removing bobbins and the latch being held against vibration in the operation of the machine.

l In the drawings: y

Fig. 1 is an elevational View of a structure to which my invention has been applied and in which it has been shown in part sectional elevation; and

Fig. 2 is an elevational view at right anglesA to the showing of Fig. 1.

Referring to the drawings in detail, l designates the whorl to be latched provided with a flange 2 at its lower end which is to engage the latch. n

The base 3 of the spindle structure is provided with a shoulder 4 and on this base is a pressed steel latch support or bracket 5 which is forced on the base 3 shoulder 4. l

This bracket has anupwardly' extending portion 6, and straddling `this portion of the bracket is a latch 7, the latch heilig bifurcated for this purpose as shown at 8. The latch is pivoted on a pin 9.

The bracket 5is also bifurcated as shown i at 1() to permit of a spring 11 being applied to the pin 9. One end 12 of this spring engages the face of the bracket 5 vwhile the other' end 13 overlies the outer face of the latch 7.

The ends of the pivot pin 9 are spun over as shown at 14 suiliciently to lock the pin securely in place but not suiiiciently to bind the latch.y

It will be appreciated that the spring 11 willpress the latch 7 rmly against the latch support thereby preventing the latch from rattling when the device is in operation@ It willbe appreciated also that the blade and whorl may be set in the spindle bolster without any eXtra operation on the part'of the operator.

until it abuts theV To remove the whorl and blade a slight lift of the latch ,7 upwardly is sufficient to clear the iange 2 of the whorl,the engagement of the latch with this iriange normally holding the wliorl in place.

l/Vhat I claim is.:-

1. In whorlV latching mechanism the combination of a bracket having a bifurcated free end., a latch bii'urcated at one end and straddling the bifurcated end of the bracket, a ypivot pin passing through the bifurcated ends of the latch and bracket, a coil spring upon said pin, said spring being under tension and having one end engaging the inside of the bracket and its other end engaging the outer face of the latch, to hold the latch under tension on said pin. f

2. In mechanism of the class described the combination of a base, a whorl'supported thereon, a flange on the whorl, a shoulder on said base, a bracket frictionally secured to y tension on said pin to reduce vibration of the4 latch when the whorl is rotating.

This speciiication signed this 2nd day of February, 1931.

ROBERT J, BARTHOLOMEW. 

